仁王經疏 1.35

1.35

Question: Why not explicitly indicate [the time] as is done below with the location and so forth, but merely say “at one time”? Answer: Day, night, and periods of time are indeterminate across the various directions, so they cannot be specifically stated. Moreover, the meaning is indeterminate: it may be a single instant, or it may be continuous, so it cannot be definitively stated. For these reasons, in general terms it merely says “at one time.”